Microbial community structure, pigment composition, and nitrogen source of red snow in Antarctica.
Microbial community structure, pigment composition, and nitrogen source of red snow in Antarctica.
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DOI：
10.1007/s00248-009-9594-9
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发表时间：
2010-04
影响因子：
3.6
通讯作者：
Fukui, Manabu
中科院分区：
文献类型：
--
作者：
Fujii, Masanori;Takano, Yoshinori;Kojima, Hisaya;Hoshino, Tamotsu;Tanaka, Ryouichi;Fukui, Manabu
“红雪”指的是红色的雪，是由适应寒冷的光养生物，也就是所谓的雪藻，大量繁殖造成的。从几个角度对南极洲Langhovde发现的红色雪进行了调查。在显微镜下，在红色雪样品中观察到不同大小的圆形红细胞。色素分析表明红雪中有虾青素的积累。微生物群落结构分析采用非培养方法。在小亚基rRNA基因的分析中，检测到几种绿色藻类、真菌和各种细菌。所检测到的细菌与嗜冷或耐冷异养菌株或从低温环境中检测到的序列密切相关。作为细菌的优势谱系，膜壳菌属的成员一致地从两个不同年份获得的样品中检测到。氮同位素组成分析表明，红雪明显富集15N。根据营养水平估算，红雪的氮源主要来自于海鸟的粪球，其中包括一种南极海洋顶级捕食者。
“Red snow” refers to red-colored snow, caused by bloom of cold-adapted phototrophs, so-called snow algae. The red snow found in Langhovde, Antarctica, was investigated from several viewpoints. Various sizes of rounded red cells were observed in the red snow samples under microscopy. Pigment analysis demonstrated accumulation of astaxanthin in the red snow. Community structure of microorganisms was analyzed by culture-independent methods. In the analyses of small subunit rRNA genes, several species of green algae, fungus, and various phylotypes of bacteria were detected. The detected bacteria were closely related to psychrophilic or psychrotolerant heterotrophic strains, or sequences detected from low-temperature environments. As predominant lineage of bacteria, members of the genus Hymenobacter were consistently detected from samples obtained in two different years. Nitrogen isotopic compositions analysis indicated that the red snow was significantly 15N-enriched. Based on an estimation of trophic level, it was suggested that primary nitrogen sources of the red snow were supplied from fecal pellet of seabirds including a marine top predator of Antarctica.
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影响因子：
4.4
作者：
Klassen, Jonathan L.;Foght, Julia M.
通讯作者：
Foght, Julia M.
影响因子：
7.2
作者：
Cunningham, FX;Gantt, E
通讯作者：
Gantt, E
影响因子：
5
作者：
DENIRO, MJ;EPSTEIN, S
通讯作者：
EPSTEIN, S
DOI：
10.1007/bf00408689
发表时间：
1970-01-01
期刊：
ARCHIV FUR MIKROBIOLOGIE
影响因子：
--
作者：
CZYGAN, FC
通讯作者：
CZYGAN, FC
影响因子：
9.5
作者：
Kumar, S;Tamura, K;Nei, M
通讯作者：
Nei, M